Answer:
the formula is used according to the given condition.
Answer:
x = 8
Step-by-step explanation:
since the triangle is isosceles then the 2 legs are congruent, that is both 4x - 3
the perimeter is the sum of the 3 sides , that is
x + 4x - 3 + 4x - 3 = 66
9x - 6 = 66 ( add 6 to both sides )
9x = 72 ( divide both sides by 9 )
x = 8
Answer:
diameter = 12 cm
radius = 6cm
circumference = 12
cm ≈ 37.68 cm
area = 36
cm² ≈ 113.04 cm²
Step-by-step explanation:
r = radius
d = diameter
C = circumference
A = area
The diagram shows a circle with a diameter of 12 cm
<u>Diameter</u>
d = 12 cm
<u>Radius</u>
r = d/2
⇒ r = 12/2
⇒ r = 6 cm
<u>Circumference</u>
C =
d
⇒ C = 12
cm
<u>Area</u>
A =
r²
⇒ A =
x 6²
⇒ A = 36
cm²
If you use
= 3.14 then:
C = 37.68 cm
A = 113.04 cm²
Angle a is 132 degrees
5x-18=3x+42
2x-18=42
2x=60
x=30
then plug 30 in the equation for angle a
5*30-18
150-18
132